松辽盆地北部常家围子地区姚一段储层特征及影响因素分析

松辽盆地北部常家围子地区姚一段储层以细粒长石岩屑砂岩为主,成岩作用进入晚成岩A亚期,原始孔隙保存差,次生孔隙的大量出现改善了该储层储集性能.通过普通薄片、铸体薄片、偏光显微镜、岩心分析测试、压汞分析、扫描电镜、阴极发光等方法对该区的姚一段储层砂岩的储集空间类型、物性特征及影响因素进行了研究,认为储层孔隙类型以溶蚀扩大粒间孔和溶蚀粒内孔为主,孔隙结构主要为ⅡA、ⅡB级,孔隙度主要为10%～15%,渗透率主要为(0.01～1)×10-3μm2,属于中孔低渗储层,储层物性主要受沉积微相类型、岩石粒度、溶解作用影响,粘土矿物的类型和充填形式对储层的渗透率影响较大.

Properties and Influence Factors Analysis of Reservoir in the First Member of Yaojia Formation of the Changjiaweizi Region,Northern Songliao Basin

The reservoir strata of the first member of Yaojia Formation of Changjiaweizi region in the northern part of Songliao basin,are mainly composed of fine feldspathic debris sandstone with A-substage of late diagenesis.And mass appearance of secondary pore improve the capability of gathering,even the primary pores were poorly preserved.The pore types,porosity,permeability and control factors of the reservoir were studied by observing normal and casting thin section,micropolariscope,core testing,mercury intrusi...